Bong base



FIG. 1 is a top plan view;

FIG. 2, a front edge elevation view taken at the front side as shown in FIG. 1;

FIG. 3, a bottom view taken at the bottom as shown in FIG. 1;

FIG. 4, a back edge elevation view taken at the back side as shown in FIG. 1;

FIG. 5, a right edge elevation view taken at the right side as shown in FIG. 1; and

FIG. 6, a left edge elevation view taken at the left side as shown in FIG. 1. 

The ornamental design for a bong base, substantially as shown. 